679026349 has 2 divisors, whose sum is σ = 679026350. Its totient is φ = 679026348.

The previous prime is 679026347. The next prime is 679026353. The reversal of 679026349 is 943620976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456121449 + 222904900 = 21357^2 + 14930^2 .

It is a cyclic number.

It is not a de Polignac number, because 679026349 - 2¹ = 679026347 is a prime.

It is a super-2 number, since 2×679026349² = 922153565272539602, which contains 22 as substring.

Together with 679026347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 679026299 and 679026308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679026347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339513174 + 339513175.

It is an arithmetic number, because the mean of its divisors is an integer number (339513175).

Almost surely, 2^679026349 is an apocalyptic number.

It is an amenable number.

679026349 is a deficient number, since it is larger than the sum of its proper divisors (1).

679026349 is an equidigital number, since it uses as much as digits as its factorization.

679026349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 679026349 is about 26058.1340275930. The cubic root of 679026349 is about 878.9460302690.

The spelling of 679026349 in words is "six hundred seventy-nine million, twenty-six thousand, three hundred forty-nine".